Around 1978 Luxman company
came with its audio cassettes for their cassette-decks.

The Luxman cassettes came in ferro-position, chrome-position and metal-position versions,
and were named XM-series.

Owners
manual:

In the cassette box.

special
futures:

The Luxman cassettes were made of extreme quality.
They have 4 wheels inside with steel axis, 4 sqew adjustments for azimuth and a 5 screw housing,
with a big felt pressure path to contact the tape firmly with the heads.
Tape guidance is superior to any other cassette on the markets at the time.

Schematic:

Modifications:

none known.

Luxman later made the simpler version of these cassettes: the
XN-series.